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Lithonia 42w PL lamp

Lithonia 42w PL lamp

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Normally I wouldnt post a modern chinese-made PL lamp, but these are interesting as they exhibit that unusual phenomenon in which one section of the tube glows a very dim pink color, while the other two sections run at full intensity and color. While ive seen this issue in many triple and quad tube PL lamps (of all brands) over the years, these Lithonia branded lamps we installed a little over two years ago in a few branches of a community bank are beginning to do this, and bad. They're all in recessed cans running base up. The light output has diminished by 1/3 due to this issue. Anybody have an idea what causes this? It looks like bad mercury starvation, but I truly dont believe thats whats happening here, since these lamps are not amalgam and have large beads of mercury inside the tube.

20190314_215620.jpg 20190325_170032.jpg 20190313_180300.jpg 20190213_192950.jpg

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Filename:20190313_180300.jpg
Album name:BlueHalide / New album
Keywords:Lamps
File Size:454 KB
Date added:Mar 13, 2019
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Date Time:2019:03:13 18:03:00
DateTime Original:2019:03:13 18:03:00
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BlueHalide
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Mar 13, 2019 at 08:24 PM Author: BlueHalide
Also worth noting, just like many other Lithonia products, the branding is only on the packaging, not the lamp itself, as you can see here.
arcblue
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Mar 14, 2019 at 06:45 PM Author: arcblue
I really would like to know too...I have seen the phenomena in many 3-U lamps where one U is dim, pink or even appears to be dead but the other Us are lit at normal brightness. I believe the ones I saw were Sylvania and they may have been a lower wattage than 42.

I'm lampin...

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